Question
It is established that RNA is the first genetic material. Explain giving three reasons.
✓
Answer
Processes like metabolism, translation, splicing evolved around RNA, RNA is reactive and catalyses reaction. In some virus it is the hereditary material. It is so unstable and hence would have mutated to lead to evolution.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
What type of organs eye of an Octopus and that of a human called? Give another example from the animal group and one from the plants of such organs. Name and explain the evolutionary process they exhibit.
Trace the development of female gametophyte (embryo sac) from megaspore mother cell in a flower. Give a labelled diagram of the final stage of female gametophyte.
Define ectoparasite and endoparasite and give suitable examples.
Describe sex-determination in birds with example.
- Draw the structure of the initiator tRNA adaptor molecule.
- Why is tRNA called an adaptor molecule?
Explain: Isolation of genetic material (DNA) Diagram is not necessary.
- Identify the polarity of strand in the diagram from a to a', and mention how many more amino acids can be expected to be added to this polypeptide chain.
- Mention the DNA sequence coding for serine and the anticodon of tRNA for the same amino acid.
- Why are some untranslated sequence of bases seen in mRNA coding for a polypeptide?
Where exactly are they present on mRNA?
In the diagram given below, show the path of a pollen tube from the pollen on the stigma into the embryo sac. Name the components of egg apparatus.
What are satellite DNA in a genome? Explain their role in DNA fingerprinting.
Explain the following two components of Darwin's theory of natural selection.
- Variations.
- Formation of new species.